Automotive Oxygen Sensor manufacturer
- PRODUCT DETAIL
Applicable to Euro Ⅳ / Euro Ⅴ / Euro Ⅵ emissions
What is oxygen sensor:
The automotive oxygen sensor is the key feedback sensor in the EFI engine control system, Is to control the car exhaust emissions, reduce the car on environmental pollution, Improve the quality of the engine fuel combustion key parts, oxygen sensors are installed in the engine exhaust pipe.
The automotive oxygen sensor is the key feedback sensor in the EFI engine control system, Is to control the car exhaust emissions, reduce the car on environmental pollution, Improve the quality of the engine fuel combustion key parts, oxygen sensors are two kinds of zirconium dioxide and titanium dioxide.
Oxygen sensor is the use of ceramic-sensitive components to measure all types of heating furnace or exhaust gas in the oxygen potential, By the chemical balance principle to calculate the corresponding oxygen concentration, to monitor and control the furnace combustion air-fuel ratio, To ensure product quality and exhaust emissions of measurement components, Widely used in various types of coal combustion, oil combustion, gas combustion and other furnace atmosphere control.
Oxygen sensor for electronically controlled fuel injection device feedback control system, Used to detect the exhaust oxygen concentration and air-fuel ratio of the concentration of thin, In the engine, the theoretical air-fuel ratio (14.7: 1) is monitored for combustion and the feedback signal is sent to the computer.
The working principle of the oxygen sensor is similar to that of the battery, and the zirconia element in the sensor acts like a electrolyte.
The basic working principle is: under certain conditions (high temperature and platinum catalyst), The use of oxidation of both inside and outside the oxygen concentration difference, resulting in potential difference, And the greater the difference in concentration, the greater the potential difference. Atmospheric oxygen content of 21%, Concentrated mixed combustion of the exhaust gas is actually no oxygen, Dilute mixed gas generated after the combustion of waste gas or emissions caused by the exhaust gas contains more oxygen, But still much less than the oxygen in the atmosphere.
In the high temperature and platinum catalysis, will be attached to the oxygen sensor on the depletion of oxygen, So the voltage difference occurs, the mixed output voltage close to 1V, Lean mixture close to 0V. According to the oxygen sensor voltage signal, Control the air-fuel ratio to adjust the fuel injection pulse width, So the oxygen sensor electronically controls the critical sensor for fuel metering. Oxygen sensor only in high temperature (end to 300 ℃ above) from the characteristics can be fully reflected before, Can output voltage. It is about 800 ℃, The reaction to the mixture is the fastest.
Zirconia oxygen sensor is reflected by the voltage changes reflect the concentration of combustible mixture, Titanium dioxide oxygen sensor is through the resistance changes reflect the combustible mixture changes. The use of zirconia oxygen sensor in the engine condition deterioration of the electronic control system can not be the actual air-fuel ratio control in the vicinity of the theoretical air-fuel ratio, While the titanium dioxide oxygen sensor in the case of deterioration of the engine conditions can also be the actual air-fuel ratio control in the theoretical air-fuel ratio near.
The control unit according to the oxygen sensor signal in a short time to adjust the fuel injection (fuel injection pulse width) called short-term fuel correction, the value of the positive and negative is the oxygen sensor output voltage control.
Long-term fuel correction is the control unit based on short-term fuel correction coefficient changes the control unit to run the data structure to correct the value.